Baker Hughes Inc. signage is displayed at one of the company's facilities in Houston, Texas, U.S., on Monday, Nov. 17, 2014. Halliburton Co., the world's second-biggest provider of oilfield services, agreed to buy No. 3 Baker Hughes Inc. in one of the largest takeovers of a U.S. energy company in years. Photographer: Aaron M. Sprecher/Bloomberg via Getty Images